@erikah friend, a "fresh" anecdote: My mother (80 years old) just peeked into my studio door and said to me: "Now that I've seen you taking pictures of the roses, remember that they need to be fertilized!" 😂😂😂... I've earned that task today! 😂😂😂

PD: At home, fertilizing with worm castings, either solid or liquid, seems to be quite good for roses and there is no risk of overdosing and damaging them.